Concrete ship



R. NEBOLSINE CONCRETE SHIP Filed April 21., 1943 Dec. 26, 1944.

2 Sheets-Sheet l INVENTOR.

Dec. 26, 1944.

NEBOLSINE NVENTOR.

Patented Dec. 26, 1944 l Q ascend Y CGNERETE. Sm RossvNebol'sine,seaclifli, N2 HpplicatiomApril 21, 1943;. SeriabNo; 4835.845

The object of: the: invention: is: to provide: a. concrete; ship: ofnormal. exterior-'1 form and? which willv overcome" serious; defectsships of; this character heretofore proposed. These: defects" inconcrete: ships include" as: a major: factor lack of adequate resistanceto the heavy and reversible longitudinal bending; moments; and;accompanying shearing; stresses which. arewimposed; uponrthe shipslhull, in; heavy weather;.; i V

The characteristic of. my construction. is; the provision of a: backbonecomposed; of. a. uni,- tary structure.- of hollow or box girdersextending substantially from the bowtol stern: of. the hull and from.bottom to main deck positioned centrallyof\ the. hull: structure; thisback. bone-,3 in. the preferred form, being tied to and coactin'gwitha-steel-reinforced deck. and the. bottom shell ure 1 a cargo ship Ihaving: deck hatches: 2 for rality of? spaced web: members 5.connecting: the

andpreferably to. a plurality of box girders, the

construction adequately resisting the: said. Ion..- gitudinal; bending,moments. The. said longitudinal: and, centrally disposed. integralcombination ofv hollow or box. girder incidently serves. with the.transverse box. girder -constructions to divide the hull into a.plurality of holds; or waterrtight compartments and provide buoyancychambers which are. ideal in refrigerated. ships: because theassemblies. of box girders arer hollow and are of such character thataccess to the; holds. may be reached; via. thetbox girder constructions.themselves through: the deck and. through side manholeswherever-desired. Also the. hollow girder construction provides; spacefor piping, and wirwalls at I. and 4'. l

shown in Figure: 3 the hull back bone? consists of a centrally disposedlongitudinally extending box girder construction which extends theentire length of the hull and which consists of'spaced parallel walls 6*and l and connecting webs 8. As to'be'noted from Figure 3 the said backbonebox girderconst'ruction merges into the bottom of the hull indicatedat 9', and. it also merges into the deck 3, being integral with the hullbottom and deck.

The major number of webs 5 and 8 are apertured so thatwalk-ways areprovided for movementof men longitudinally of the box girders of theback bone or box girders of the. hull construction per se. However, atpredetermined places in the said box girder construction, impering. inaddition to the safety factor in event: of

puncturev of the outside shell;

The above. and further objects of the invention. willbel described withreference tothe accompanying, drawings, in. which:

Figure. 1 isa view in. elevation, showing, the embodiment oftheinvention in. at cargo ship.

Figure 2 is a planview, partly in horizontal section, on the lines 2-2,Figure 1.

, Figure- 3 is a transverse enlarged. section.- on the. line 3-3,.Figure 2;

Figure 4 is a fragmentary detailed. view showing: a. portionrof. thecentral longitudinal box girder construction and that area communicatingwith one of the transverse box girder constructions and illustratingaccess thereto from the deck and from one girder construction toanother.

Figure 5 is a fragmentary sectional view, taken vertically through aside and part of the bottom of a modified form of hull in'which thebottom is cellular.

Referring to the drawings, I have shown in Figforate transversewebs areprovided, as indicated at [0, H, [2, l3, and also at other areas. Thusshould the hull be pierced at any point, the incoming water will belocalized in an area bounded at each end bythe imperforate webs.

A plurality of spaced transverse box girder constructions are employed,each consisting; of spaced and opposed walls l4, 15, which merge intothe walls of the back bone, the inner walls of the box girders formingthe shell of the hull, includingthe bottom, and also the deck 3; Theopposed walls I4, I 5, of the transversebox girder constructionsareconnected by spaced perforated webs [6; each series' of these perforatewebs being bounded at its ends by imperforate' webs H The deck 3 willbe-provided witha plurality of manholes l8 placed directly over thetransverse box girder constructions; Thus members of the ships staff orfitters may have access to each box girder section bounded byimperforate webs, may pass from the various sections of the transversebox girder constructions to the various sections of the back bone andalso to the various sections of the box girder constructions at thesides of the hull as indicated, for example, by the arrows in Figure 3.If desired, water-tight doors may be provided in the holds for lateralor as a combined general freighter and oil carrier.

The provision of the central longitudinally extending box girder backbone" provides an ideally disposed support for erecting masts and boomsemployed in loading and unloading cargo. Also, and as an importantfactor, the said back bone gives strong support to the hull for sidelaunching withmarine railways.

' Equally important to the above, is the function of the back bone in sotaking up stresses particularly heavy and reversible longitudinalbending moments, so that reinforcing rods of steel and other reinforcingmetallic members may be conserved and thicknesses of hull wallsreduced.In fact, the steel reinforced construction of the deck and bottom is,for the first time in hull structures of the present type, enabled toadequately resist lengthwise bending moments with the provision ofrelatively thin walls. For example, the walls I and 4, reinforced in theusual manner by steel rods or equivalent reinforcement, will beadequately strong in my hull construction when of -3-3 /2.

, In buildiing the hull and it constituent box girder constructions, themetallic reinforcing members may be supported by pins or othersupporting means on the outside of forms, and the concrete blown bypressure onto the outside of the forms, which forms are pulled up beforethe deck is formed or placed. In this manner the density of the concreteis so increased that great strength is provided and, at the same time,the process of construction is simplified.

Extending from side to side of the longitudinal box girderconstructions, and preferably lying at 7 both bottom and under-deckposition, concrete girders, plain or steel reinforced, may bepositioned, as indicated at l9, Figures 2 and 3. It will also beunderstood that various modifications may be made in the form andarrangement of the elements illustrated and described without departingfrom the spirit of the invention.

Having described my invention, what I claim and desire to secure byLetters Patent is as follows:

1. In a concrete ship, and in combination with a hull having sidesconsisting of hollow girders, a bottom and a deck, of a back boneconstruction consisting of a hollow girder construction extendingsubstantially from end to end of the hull, longitudinally and centrallythereof and tied to the bottom and deck.

, 2. In a concrete ship, and in combination with (65 ter-tightcompartments.

a hull having sides consisting of hollow girders, a bottom and a deck,of a back bone consisting of a hollow girder construction extendingsubstantially from end to end of the hull, longitudinally and centrallythereof and tied to the bottom and deck, and a plurality of spacedtransverse- 1y extending hollow girders tied to said back bone and tothe hollow box girders, dividing the hull into a plurality of holdspositioned at opposite 10 sides of the back bone.

3. A concrete ship construction in accordance with claim 1, in which thedeck is of reinforced concrete construction merging into and integralwith reinforced concrete walls of both the hollow girder sideconstruction of the hull and the walls of the hollow girderconstructions comprisingthe back bone.

4. A concrete ship [constructed in accordance with claim 1, in which thehollow girders are formed with spaced major concrete walls and series oftransverse internal webs, each series including a plurality of perforatewebs separated as to communication by imperforate webs, providing aplurality Ofwater-tight compartments extending both longitudinally andtransversely of the hull.

5. In a concrete ship, and in combination with a hull having sidesconsisting of hollow girders, a bottom and deck, of a back boneconstruction consisting of a hollow girder construction, ex-

tending substantially from end to end of the hull, longitudinall andcentrally thereof and tied to the bottom and deck, a plurality of spacedtransversely extending hollow girders tied to the said backbone and toth side hollow girders,

dividing the hull into a plurality of holds po-' sitioned at oppositesides of the backbone, the hollow girders being formed Withspaced majorconcrete walls and transverse internal webs, in

140 cluding a plurality of series of perforate Webs,

each series of perforate webs being bounded at its ends by imperforatewebs, providing a plurality of water-tight compartments extending bothlongitudinally and transversely of the hull, the

1, deck being provided with a plurality of spaced manholes, disposedover the hollow transverse girders for access to a plurality of the saidwater-tight compartments.

6. In a concrete ship, and in combination with a hull having sidesconsisting of hollow girders, a bottom and deck, a plurality of spacedtrans versely extending hollow girders tied to the side hollow girders,dividing the hull into a plurality of holds, the hollow girders beingformed with spaced major concrete walls and transvers internal webs,including a plurality of series of perforate webs, the series ofperforate webs being separated by imperforate webs, providing aplurality of water-tight compartments extending both longitudinally andtransversely of the hull,

ROSS NEBOLSINE.

